Improvement in hot-blast bloomery-forge fires



P. A. SABBATUN.

Making Iron Directi Patented Feb.-vr 24, 1845.`

. back horizontal pipes together.

ATES e Nrrnn ArnNT OFFICE..

PAUL A. SABBAION, OF READING, -PENNSYLVANIA.

Specication forming part of Letters Patent No. 3,922, dated February 24,1845.'

To all whom it may concern:

Beit known that I, PAUL A. SABBATON, of the borough of Beading, in thecounty of Berks and State of Pennsylvania, have invented a new anduseful Improvement in the Manner of Constructing a Hot-BlastBloomery-Forge Fire; and I do hereby declare that the following is afull and exact description thereof.

In the accompanying drawings, Figure A is a front View of mybloomery-forge fiire and chimney, showing the manner in which thehotblast-pipes are combined therewith, the mason-work above the mantelbeing removed for thev purpose of showing the arrangement of these pipesin the interior of the chimney. Fig. B is a vertical section through thechimney and lire-place from front to back, showing the horizontal andsiphon pipes, the former in transverse section and the latter inelevation. Fig. C is a side view of the chimney or stack, showing thearrangement of the pipes that convey the heated air from the fronthorizontal pipe to the ltuyere, and also that through which the air fromthe blowing apparatus is conveyed to the heating-tubes.

In each of these figures where the same parts are represented they aredesignated by the same numbers. Y

Nos. l and 2 are the main front and back horizontal pipes, into thelatter of which the pipe No. 3 conveys the cold air from the blowingapparatus.

Nos. et 4 are a series of siphon or inverted- U pipes, which extendacross the chimney from front to back and connect the front and From theends of the front horizontal pipe proceed the pipes 5 5, which conveythe-heated air to the tuyeres.

No. 6 are the tuyere-holes.

No. 7 are the mantel-plates, above which in Fig. A the mason-work isremoved, as before stated. I

Nos. 8 8 represent a space between the hotblast pipes and the interior0f the stack.

No. 9 is the flue above said pipes.

In the manner of arranging the pipes for obtaining the hotblast, asherein represented and described, I do not claim that there is anythingnew or of my invention, I having in this particular adopted a system ofpipes for heating the air, rst used in England, and known under the nameof Neilsons pipes77 for the hotblast.

My improvement consists, simply, in the manner in which I have combinedthese pipes with the bloomery-forge iire or chimney.

I am fully aware that there is not any novelty in the mere applicationof the hotblast to the bloomery-forge, this having been carried intooperation in a great variety of ways; but I have, as I verily believe,so combined the hotblast-pipes with said forge-fire as to obviate theseveral objections which have in practice been found to interfere withthose erected prior to my carrying my plan into operation. In mostinstances the air has been heated in an arch erected at the tunnel-headof a furnace, within which head pipes have been arranged in a mannersubstantially the same with that herein described; but in this case, aswell as under some other arrangements, besides the necessity of erectingan expensive arch of nre-brick, the plan itself has not answered thepurpose intended. The particles of ore and of cinder which have beenprevented from escaping have been found to fill up the openings in thearch, to obstruct the draft, and to adhere to the pipes in such quantityas in a short time to prevent the air that passes through them frombeing duly heated. In a few days7 use only, as I have repeatedlyexperienced, they are thus rendered incapable of heating the air to sucha degree as t0 produce any useful effect. In my plan it will be seenthat the heating-pipes are in close proximity with the bloomery-re, andthat I dispense entirely with the arch, while I give to my chimney sucha form as to produce al1 its anticipated benefits without its cost orinconveniences.

Having thus fully described the nature of my improvement in the mannerof applying the hotblast to the bloomery-forge iire, I do hereby declarethat I do not make any claim to the applying of the hotblast thereto,nor do I make any claim to the form or combination of the pipes forheating the air, this being the ner herein described and represented, soas saine with numerous others which have been to effect the desiredobject Without the use of long known and used; but an arch or of anyanalogous structure. To WhatI do claim as of my invention, and dethisparticular combination and arrangement sire to secure by Letters Patent,is- I limit my claim.

The manner in Which Ihave combined said PAUL A. SABBATON.

pipes With the bloomery-forge re by placing Vitnesses: them Within thechimney immediately over l WILLIAM BETZ, said re7 Which chimney isformed in the manl HENRY BINDLY.

